These investigations led to numerous small contributions to the journals for Swiss physicians, a lecture to the general session of the International Medical Congress in Rome in April 1874 on the improvement of projectiles from the humane point of view, and two larger works: Über

I was anticipated here by J.J. Thomson who in the very paper in which he published the confirmation of my experiments showed that once the electrification of the rays had been demonstrated, it was easy to obtain the velocity and the charge of the projectiles from the action of the electrical field and the magnetic field.